ADL Opus-3 Solid State Opto Compressor - Mono  From ADL

Anthony's take on the beloved LA-3a compressor! Smooth, transparent, and easy to use solid state compression with just a touch of added fullness and body. 

Anthony Demaria Labs


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LDC Vocal Mic Shootout: Neumann U87Ai, Neumann U47 FET, Bock Audio iFET & Soyuz SU-019 LDC FET

In this video we present an LDC vocal microphone shootout using the Neumann U87Ai, the Neumann U47 FET, the Bock iFET and the Soyuz SU-019. Can you tell which one's which? If you are interested in hearing the results and/or getting ahold of the audio files from this shootout, give us a shout, we'd love to hear from you!

Manufacturer's Description from ADL

The Opus-3 is an all discrete solid-state design commonly referred to as a fixed gain circuit. The heart of the Opus-3 is ADL's custom hand matched optical attenuator - the same optical attenuator found in the world renowned ADL 1000 mono and ADL 1500 stereo limiters. Hand matching components allows Anthony to create a unique soft knee compression characteristic representative only of the ADL brand. Although time-consuming, choosing identical parts results in superior consistency and reliability.

The Opus-3 has many practical applications, allowing engineers and record producers flexibility in the studio. From tracking to mixing, vocals to instruments and stereo buss, the Opus-3 will be an invaluable tool for the job.


Anthony Demaria Labs

About Manufacturer

Since 1987, ADL has been supplying the finest all-tube products to the biggest names in the audio industry. From legendary recreations of the classic Fairchild 670, the classic LA2A, the classic LA3, or his own new modern creation of a truly exquisite mic preamp, ADL has recreated the legends of yesterday, as well as some modern gems of new studio technology. ADL products have been used on countless successful recordings throughout the world. As they look to the future they pledge to continue developing spectacular sounding analog and pure-tube products, inspired by the great vintage era of the past.


  • Frequency response: 20Hz to 20kHz +/- 1 dB
  • Clip: +28 dBu
  • Distortion THD-N: 0.19% @ +4 dB
  • Maximum Gain Reduction: 20 dB
  • Attack Time: Approximately 1.5 ms
  • Release Time: Approximately 1 to 2 seconds
  • Noise, unweighted: -85 dBu
  • Input/Output Impedance: 600 Ohm
  • Dimensions: 3.5" height x 7.75" width x 10.5" depth